Title:
METHOD FOR CRYSTALLIZING ACIDIC AMINO ACID
Document Type and Number:
WIPO Patent Application WO/1998/007686
Kind Code:
A1
Abstract:
A method for crystallizing high-purity acidic amino acid crystals in a high yield (a high recovery) from a liquid containing an acidic amino acid. The method comprises crystallizing acidic amino acid crystals from a liquid containing an acidic amino acid and impurities, such as certain pigment materials and proteins, and is characterized by adding a nonionic surfactant. According to this method, large acidic amino acid crystals can be effectively obtained without incorporation of pigments and without sacrificing the yield of the acidic amino acid.
Inventors:
KAWABATA YASUSHI (JP)
NAKAGIRI TAKESHI (JP)
NAKAGIRI TAKESHI (JP)
Application Number:
PCT/JP1997/002780
Publication Date:
February 26, 1998
Filing Date:
August 08, 1997
Export Citation:
Assignee:
AJINOMOTO KK (JP)
KAWABATA YASUSHI (JP)
NAKAGIRI TAKESHI (JP)
KAWABATA YASUSHI (JP)
NAKAGIRI TAKESHI (JP)
International Classes:
C07C227/42; C07C229/24; (IPC1-7): C07C227/42; C07C229/24
Domestic Patent References:
| WO1990009372A1 | 1990-08-23 |
Foreign References:
| JPS3816460B1 | ||||
| JPS4619610B1 | 1971-06-01 |
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